Malicious PDF — malware analysis report

Static analysis result for SHA-256 28e40cb4c986b0d3…

MALICIOUS

PDF

52.6 KB Created: 2020-11-07 01:45:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 55c2ce7bb665fd0c75ebfdc3378af73c SHA-1: 8e747048a6f76c437bb648ad7f3e3d5918317f56 SHA-256: 28e40cb4c986b0d3906abac965b7215569675ea02d601c0851914f3bd92a7b0d
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains numerous external links, a common tactic for SEO poisoning and traffic redirection. The primary link, disguised as a manual, leads to a link farm hosted on disposable domains, suggesting an attempt to drive traffic to potentially malicious or ad-filled content. The ML classifier strongly indicates maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://trafftec.ru/aws?keyword=craftsman+model+315.117151+belt+sander+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4449781/normal_5fa189e8c5e53.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/5058540.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369797/normal_5f994252bd388.pdfIn PDF document text
    • https://dilenobepaw.weebly.com/uploads/1/3/4/6/134662491/nibaxam.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367960/normal_5f9110dae81b0.pdfIn PDF document text
    • https://dusikoxi.files.wordpress.com/2020/11/iron_man_2_in_hindi_download_filmyzi.pdfIn PDF document text
    • https://xuminewewebi.files.wordpress.com/2020/11/15670121941.pdfIn PDF document text
    • https://nuziwonuw.files.wordpress.com/2020/11/escale_le_creusot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41d22f2c-6436-4a1a-b3e0-688f37e26b06/67180655815.pdfIn PDF document text
    • https://judepikewen.files.wordpress.com/2020/11/types_of_antennae_of_insects.pdfIn PDF document text
    • https://wiludilake.files.wordpress.com/2020/11/juzebogonevasagodazu.pdfIn PDF document text

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